کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413594 | 1506632 | 2007 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vapour pressure and volumetric studies in aqueous solutions with ascorbate ions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Vapour pressure and volumetric studies in aqueous solutions with ascorbate ions Vapour pressure and volumetric studies in aqueous solutions with ascorbate ions](/preview/png/5413594.png)
چکیده انگلیسی
Vapour pressures of water over saturated solutions of l-ascorbic acid and calcium-l-ascorbate were measured in the 280 K to 318 K temperature range and the activities of water, osmotic coefficients and the molar enthalpies of vaporization were derived from them. Densities of aqueous solutions of l-ascorbic acid, magnesium-l-ascorbate and calcium-l-ascorbate were determined at 5 K temperature intervals, from T = 288.15 K to T = 333.15 K. Densities served to evaluate the apparent molar volumes, V2,Ï(m,T), the cubic expansion coefficients, α(m,T) and the changes of isobaric heat capacities with respect to pressure, (âCP / âP)T,m. They were qualitatively correlated with the changes in the structure of water when ascorbic acid and magnesium and calcium ascorbates are dissolved in it.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volumes 131â132, 15 March 2007, Pages 7-16
Journal: Journal of Molecular Liquids - Volumes 131â132, 15 March 2007, Pages 7-16
نویسندگان
Alexander Apelblat, Emanuel Manzurola,